condition mean min max ZT0-3 1.355225 1.355225 1.355225 ZT4-7 1.0146895 1.0146895 1.0146895 ZT8-11 0.7790845 0.7790845 0.7790845 ZT12-15 0.6902595 0.6902595 0.6902595 ZT16-19 0.5534 0.5534 0.5534 ZT20-23 0.974361 0.974361 0.974361